A church near me has a small grand (Yamaha GA1) that doesn't stay in tune very long. The temperature is kept between 60 & 80, and the piano has a Dampp-Chaser heat bar and humidistat. Two other competent tuners have also tried to tame this little beast without much success. The last time I tuned it (Aug. '10) I pulled the action and checked the mating of the pinblock and plate flange. I used my 6-in. metal ruler (.018" thickness) and found gaps between the pinblock and plate flange from F#3 to A#4 and also from B6 to A#7. The plate flange ended at A#7, so I guess the top "gap" runs from B6 to the treble inner rim where the pinblock is fastened. How likely is it that this is the source of the instability. If so, do you have any suggestions for improving the situation, short of a rebuild, which is not likely to happen. Thanks. Claude Harding -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20110113/442bd454/attachment.htm>
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